Post for piano-backs.



No. 654,344. Patented July 24, I900.

" 0. N. EATON.

P iron PIANO BACKS.

'cation filed Kay 12, 1899.)

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'5. 014, 351 M fl ctm I UNITED STATES PATENT OFFICE.

OLIVER N. EATON, OF NEW YORK, Y., ASSIGNOR OF ONE-HALF TO JOHN BIDDLE, OF SAME PLACE.

POST FOR PIANO-BACKS.

SPECIFICATION forming part of Letters Patent No. 654,344, dated July 24, 1900. Application filed May 12, 1899. erial No. 716,519. (No model.)

To all whom it may concern:

Be it known that LOLIVER N. EATON,a citi-' zen of the United States, and a resident of the city, county, and State of New York, have invented an Improved Post for Piano-Backs, of which the following is a specification, refer enoe being had to the accompanying illustrations.

Figure 1 is a rear View of the back of an upright piano, showing the usual location of posts A A and grips e e; and Fig. 2 is a crosssectionas, for instance, on the line X Xof any one of the posts, showing the improved construction thereof in detail.

Similar letters of reference indicate similar parts throughout the views.

The back of a piano must possess as much strength and rigidity as possible to sustain the great and constant strain from the many taut a strings thereon, and upon its ability to maintain its size and shape depends the keeping in tune of the piano. tracts, the strings are correspondingly let up and thrown out of tune. Such tendency has 2 3 heretofore been obviated where solid wooden.

posts have been used by increasing the weight of the metal framework supporting the studs or string-plate; but this is objectionable in many ways, and my invention secures even' greater strength and rigidity,with less weight,

by a novel yet simple and advantageous construction of the post. The details of this new and useful construction of the post is shown in. Fig. 2, and the improvement consists in 3 5 making the post of four partsthe core B and three faces A O G, surrounding. The core or center piece B is rectangular, and two of the If the back springs orcon faces or the side pieces 0 G are each provided with longitudinal grooves c 0, located as shown, and these correspond with and take 40 in the tongues a a, with which the front face or side piece A is provided, as shown, the whole being put together and combined, as clearly illustrated. This construction in parts permits the thorough seasoning of the. woods used and their selection and arrangement so as to get the grains in the most advantageous combination to secure the desired rigidity and permanence of shape. In combining the parts the core or center piece alone has glue 5o put upon the only three sides coming into contact with the outer parts. The front and two sides are then brought together, as shown, around the core and the whole pressed into practically a single piece, which will not warp 5 5 or give and possesses the greatest possible stiffness and strength. By this process the permanent combination of the whole is accomplished easily, no excess glue exudes, and there is much saving of time and labor in manufacture, and the product is in appearance a perfect single piece of selected wood.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-

A piano-back post consisting of a center piece,two side pieces, each with a groove, and a front piece with a tongue on each side, all combined to form a single piece constructed in the manner and for the purpose substantially as specified.

OLIVER N. EATON. Witnesses:

GEO. W. BROWN, J r., JOHN M. COOPER. 

